Java Matcher reset(CharSequence)用法及代碼示例

Matcher類的reset(CharSequence輸入)方法用於重置此匹配器，並將作為參數傳遞的輸入String插入此匹配器。

用法:

public Matcher reset(CharSequence input)

參數：此方法采用參數輸入，即重置後要插入匹配器中的字符串。

返回值：用此輸入複位後，此方法返回此Matcher。

下麵的示例說明Matcher.reset()方法：

示例1:

// Java code to illustrate reset() method 
  
import java.util.regex.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // Get the regex to be checked 
        String regex = "Geeks"; 
  
        // Create a pattern from regex 
        Pattern pattern 
            = Pattern.compile(regex); 
  
        // Get the String to be matched 
        String stringToBeMatched = "GeeksForGeeks"; 
  
        // Create a matcher for the input String 
        Matcher matcher 
            = pattern 
                  .matcher(stringToBeMatched); 
  
        // Get the current matcher state 
        System.out.println("Current Matcher: "
                           + matcher.toMatchResult()); 
  
        // Reset the Matcher using reset() method 
        String newStringToBeMatched 
            = "GeeksGeeksGeeks"; 
        matcher = matcher 
                      .reset(newStringToBeMatched); 
  
        // Get the current matcher state 
        System.out.println("Current Matcher after Reset: "
                           + matcher.toMatchResult()); 
    } 
}

輸出：

Current Matcher: java.util.regex.Matcher[pattern=Geeks region=0,13 lastmatch=]
Current Matcher after Reset: java.util.regex.Matcher[pattern=Geeks region=0,15 lastmatch=]

示例2:

// Java code to illustrate reset() method 
  
import java.util.regex.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // Get the regex to be checked 
        String regex = "GFG"; 
  
        // Create a pattern from regex 
        Pattern pattern = Pattern.compile(regex); 
  
        // Get the String to be matched 
        String stringToBeMatched 
            = "GFGFGFGFGFGFGFGFGFG"; 
  
        // Create a matcher for the input String 
        Matcher matcher 
            = pattern 
                  .matcher(stringToBeMatched); 
  
        // Get the current matcher state 
        System.out.println("Current Matcher: "
                           + matcher.toMatchResult()); 
  
        // Reset the Matcher using reset() method 
        String newStringToBeMatched 
            = "GFG means GeeksForGeeks"; 
        matcher = matcher 
                      .reset(newStringToBeMatched); 
  
        // Get the current matcher state 
        System.out.println("Current Matcher after Reset: "
                           + matcher.toMatchResult()); 
    } 
}

輸出：

Current Matcher: java.util.regex.Matcher[pattern=GFG region=0,19 lastmatch=]
Current Matcher after Reset: java.util.regex.Matcher[pattern=GFG region=0,23 lastmatch=]

參考： Oracle Doc

相關用法

注：本文由純淨天空篩選整理自Kirti_Mangal大神的英文原創作品 Matcher reset(CharSequence) method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。